Photo-litho



NICHOLS & CLARK.

subsoil-Plow.

No. 69.117. Patented Sept. 21, 1867.

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WILLIAM I). NICHOLS AND NELSON W. CLARK, OF CHICAGO, ILLINOIS. LettersPatent No. 69,117, dated Sqnembm' 2%, 1867.

IMPROVEMENT IN PLOUGHS.

digs fitlgtbule mom in in tlgesc idiots who ant mating and of tlge same.

TO ALL WHOM IT MAY CONCERN:

Be it known that we, W'ILLIAM D. NICHOLS and NELSON W. CLARK, ofChicago, Cook county, State of Illinois, have invented an improvedsubsoil Plough-Attachment; and do hereby declare that, the following isa full and exact'deseription thereof, reference being had to theaccompanying drawing, making part of this specification.

, A is a plough, B the beam, V the handles thereof. C is the subsoilplough, with the upright standard E, by which it is attached firmly tothe beam by the clasp F and to the inside of the land-side by the strap0. The eoulter D connects the point of the subsoil plough to theland-side, and is bolted thereto by the bolt 5.

y This eoulter adds great strength to the subsoil plough, and should iteoine in contact with a stone, it is thrown out without damage.

This coulter may be attached to the subsoil plough back of the point 1,when. desired. The bolts 5, 3,

and 4, through the land-side of the plough, are sufiieient to attach thecoulter D and the strap 0 thereto. This forms a very simple, cheap, andellieieut attachment. The subsoil plough enters the ground at Land risesgradually to 2, at the rear of the plough, which loosens the groundsufficiently.

Whatwe claim by our invention, and desire to secure by Letters Patent,is-- 1. Attaching the subsoil plough C to the land-side and beam of aplough, as described. 2. The coultcr l), described.

WILLIAM i). NICHOLS, NELSON W. CLARK.

Witnesses:

HENRY E. NIcnoLs, S. C. Snorwnnt.

